Towards low-friction and wear-resistant plasma sintering dies via plasma surface co-alloying CM247 nickel alloy with V/Ag and N

Zhenxue Zhang, Xiaoying Li, Hanshan Dong, Eluxka Almandoz Sánchez, Gonzalo García Fuentes, Yi Qin

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Abstract

Nickel based superalloys have good oxidation and creep resistance and hence they can function under high mechanical stress and high temperatures. However, their undesirable tribological behaviour is the major technical barrier to the challenging high-temperature, lubricant-free plasma sintering tool application. In this study, nickel based CM247 superalloy surfaces were co-alloyed using innovative active screen plasma technology with both interstitial element (e.g. N) and substitutional alloying elements (e.g. V and Ag) to provide a synergy effect to enhance its tribological properties. The tribological behaviour of the plasma co-alloyed CM247 superalloy surfaces were fully evaluated using reciprocal and pin-on-disc tribometers at temperatures from room temperature to 600 ∘C. The experimental results demonstrate that the co-alloyed surface with N, Ag and V can effectively lower the friction coefficient, which is expected to help demoulding during lubricant-free plasma sintering.
Original languageEnglish
Number of pages7
DOIs
Publication statusPublished - 9 Aug 2015
Event4th International Conference on New Forming Technology - Crowne Plaza Glasgow, Glasgow, United Kingdom
Duration: 6 Aug 20159 Aug 2015
http://www.icnft2015.com/ (conference web site)

Conference

Conference4th International Conference on New Forming Technology
Abbreviated titleICNFT2015
CountryUnited Kingdom
CityGlasgow
Period6/08/159/08/15
Internet address

Keywords

  • low-friction
  • wear-resistant
  • plasma sintering dies
  • co-alloying
  • V/Ag
  • CM247 nickel alloy
  • superalloys

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